During white-washing of walls, slaked lime reacts slowly with carbon dioxide in air to form a thin layer of calcium carbonate on the walls. Which of the following reactions represents this correctly?

Calcium oxide reacts vigorously with water to produce slaked lime whose solution is used for white-washing walls. This slaked lime reacts with component (A) in air to form a thin layer of component (…

When copper reacts with moist carbon dioxide (CO₂) in air, it forms agreen coating of which one of the following compounds?

Which one of the following statements regarding oxidation and reduction reactions is NOT correct ?

When limestone (calcium carbonate, CaCO₃) is heated strongly, it decomposes to form quicklime (calcium oxide, CaO) and carbon dioxide gas (CO₂). This reaction is an example of:

Which one of the following does not form oxide on reaction with oxygen?